Abstract: 4-Aminobenzoylguanidines of the formula I ##STR1## in which A, R.sub.1, R.sub.2 and R.sub.3 have the meanings given, and the physiologically unobjectionable salts thereof exhibit antiarrhythmic properties and are active as inhibitors of the cellular Na.sup.+ /H.sup.+ antiporter.

Abstract: Alkyl-benzoylguanidines of the formula I ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 have the meanings given, and physiologically acceptable salts thereof show antiarrhythmic properties and act as inhibitors of the cellular Na.sup.+ /H.sup.+ antiporter.

Abstract: 3-Alkoxycarbonyl thiadiazinones of the formula I ##STR1## and physiologically unobjectionable salts thereof, in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, Q and n have the meanings described herein, exhibit a positively inotropic action and can be employed for the therapy of cardiac insufficiency.

Abstract: Benzoylguanidines of the formula I ##STR1## wherein R.sup.1 and R.sup.2 have the meanings indicated herein, and their physiologically acceptable salts, show anti-arrhythmic properties and act as inhibitors of the cellular NA.sup.+ /H.sup.+ antiporter.

Abstract: 4-Mercaptobenzoylguanidines of the formula I ##STR1## in which A, R.sub.1, R.sub.2 and R.sub.3 have the meanings given, and the physiologically unobjectionable salts thereof exhibit antiarrhythmic properties and are active as inhibitors of the cellular Na.sup.+ /H.sup.+ antiporter.

Abstract: Described herein are novel imidazopyridine derivatives of the formula I ##STR1## wherein R is ##STR2## and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined in Patent Claim 1, and their salts, which exhibit antagonistic properties towards angiotensin II and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and increased intraocular pressure, and of disorders of the central nervous system.

Abstract: Novel imidazopyridine derivatives of the formula ##STR1## wherein R is ##STR2## and R.sup.1, R.sup.2, R.sup.3, R.sup.4, Ar.sup.1, X and Y are as defined in the specification, and their salts, exhibit antagonistic properties toward angiotensin II and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and increased intraocular pressure, and of disorders of the central nervous system.

Abstract: Piperidine and piperazine derivatives of formula I ##STR1## wherein R.sup.1 and R.sup.2 are H or A,R.sup.3, R.sup.4 and R.sup.5 are each independently H, Hal, OH, OA, OAc, NO.sub.2, NH.sub.2, NHAc, NHSO.sub.2 A or CN, orR.sup.3 and R.sup.4 together are --O--(CH.sub.2).sub.m --O--,n is 0, 1 or 2X is O or CH.sub.2, if n=0 or 2, or CH.sub.2, NH, NA or NAc, if n=1,Y is CH or N,m is 1 or 2,Hal is F, Cl, Br or I,A is C.sub.1-6 -alkyl,Ac is C.sub.1-8 -alkanoyl C.sub.1-10 -aralkanoyl or C.sub.7-11 -aroyl,and their physiologically acceptable salts show antiarrhythmic effects.

Abstract: Novel imidazopyridine derivatives of formula I: ##STR1## wherein R is ##STR2## and R.sup.1, R.sup.2, R.sup.3, R.sup.4, X and Y are as defined herein, and their salts, exhibit antagonistic properties toward angiotensin II and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and increased intraocular pressure, and of disorders of the central nervous system.

Abstract: 4-amino-1-piperidylbenzoylguanidines of the formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the given meanings, and also the physiologically compatible salts thereof, exhibit antiarrhythmic properties and act as inhibitors of the cellular Na.sup.+ /H.sup.+ antiporter.

Abstract: Novel imidazopyridine derivatives of formula I ##STR1## wherein ##STR2## and R.sup.1, R.sup.2, R.sup.3, R.sup.4, X and Y are as defined herein, and their salts, exhibit antagonistic properties toward angiotensin II and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and increased intraocular pressure, and of disorders of the central nervous system.

Abstract: Novel imidazopyridine derivatives of formula I ##STR1## and X, --Y.dbd.Z--, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 as defined herein, and their salts, exhibit antagonistic properties towards angiotensin II and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and increased intraocular pressure, and of disorders of the central nervous system.

Abstract: Benzimidazole compounds of the formula I ##STR1## and salts thereof, exhibit antagonistic properties toward angiotensin II and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and an increased intraocular pressure, as well as disturbances of the central nervous system.

Abstract: Novel imidazopyridine derivatives of the formula I ##STR1## in which R is ##STR2## and R.sup.1 to R.sup.4, X and Y are as defined herein, and their salts have antagonistic properties towards angiotensin(II) and can be used for the treatment of hypertension, aldosteronism, cardiac insufficiency and increased intraocular pressure and also disorders of the central nervous system.

Abstract: 2-oxoquinoline derivative of formula I; ##STR1## wherein R is ##STR2## and R.sup.1 to R.sup.6 and X are as defined in claim 1, and their salts exhibit antagonistic properties towards angiotensin II and have inter alia a hypotensive action.

Abstract: New 1,2-dihydro-2-oxopyridines of formula I ##STR1## in which R is the radical ##STR2## and R.sup.1 to R.sup.6 and X are as defined herein,and their salts, have antagonistic properties towards angiotensin II and can be used for the treatment of hypertension, aldosteronism and cardiac insufficiency.

Abstract: Novel imidazopyridine derivatives of formula I: ##STR1## wherein R is ##STR2## R.sup.1 is A, alkenyl or alkynyl each having up to 6 C atoms, R.sup.2 is H, COOH, COOA, CN, NO.sub.2, NHCOR.sup.5, NHSO.sub.2 R.sup.5 or 1H-tetrazol-5-yl,R.sup.3 is R.sup.5 --CO--alkyl, Ar--CO--alkyl, Het--CO--alkyl or Het-alkyl each having 1-6 C atoms in the alkyl moiety,R.sup.4 is H or Hal,R.sup.5 is alkyl having 1-6 C atoms, wherein one or more H atoms can also be replaced with F,X is absent or is --NH--CO--, --CO--NH--, --O--CH(COOH)--, --NH--CH(COOH)--, --NA--CH(COOH)--, --CH.dbd.C(COOH)--, --CH.dbd.C(CN)-- OR --CH.dbd.C(1H-tetrazol-t-yl)--,Y is O or S,A is alkyl having 1-6 C atoms,Ar is unsubstituted phenyl or phenyl monosubstituted by R.sup.5, OR.sup.5, COOH, COOA, CN, NO.sub.2, NH.sub.2, NHCOR.sup.5, NHSO.sub.2 R.sup.

Abstract: Thiadiazinones of the formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1, show positively inotropic and vasodilating action and are suitable for combating cardiovascular diseases.